Model DHS Fre-Heater® Heat Recovery System

Paul Mueller Company Model "DHS" Fre-Heaters® channel recovered energy into a single Fre-Heater unit, producing plentiful hot water to satisfy your needs.

With our dual jacket, there are no concerns about refrigerant leakage and our industrial-grade, fully-insulated glass storage tank assures potable water and minimal heat loss.

The Model "DHS" Fre-Heater has an 119-gallon capacity. 


  • Stainless steel outer jacket. Rust-resistant exterior requires no maintenance.
  • Mueller Temp-Plate heat transfer surface cools the super-heated refrigerant from the condensing units and harvests the system’s wasted heat energy.
  • Industrial-grade, fully insulated, glass-lined storage tank assures minimal heat loss and long-term reliability.
  • Factory-installed anode(s) provides superior galvanic corrosion protection for the water storage tank. 
  • Five-year limited warranty protects your purchase.
  • Complies with CSA regulations for the United States and Canada.
  • Temperature of hot water depends on size of condensing units and cooling time.  
  • Channels recovered energy into one Fre-Heater unit.
  • Designed for 150 psi maximum water working pressure and 500 psi maximum refrigerant  working pressure.
  • Has an 119-gallon capacity.
  • Model "DHSE" Fre-Heaters offer all of the features of standard Model "DHS" Fre-Heaters with the addition of a 4,500 - or 6,000-watt, 240- or 460-volt electric element. 

Specifications and Sizing

Model No. Part No. Water Connection (in) No. of Refrig. Circuits Refrig. Connection Size (in) Per Circuit Refrig. Application Capacity* Height (in) Diameter (in) Approx. Shipping Weight (lb)
DHS-120 8825141 1¼ FPT 1 1 5/8 ODM 14-70 ton 62 29.5 440
DHSE-120A4 8825142 1¼ FPT 1 1 5/8 ODM 14-70 ton 62 29.5 440
DHSE-120B4 8825143 1¼ FPT 1 1 5/8 ODM 14-70 ton 62 29.5 440
DHSE-120A6 8825213 1¼ FPT 1 1 5/8 ODM 14-70 ton 62 29.5 440
DHSE-120B6 8825214 1¼ FPT 1 1 5/8 ODM 14-70 ton 62 29.5 440

*Refrigeration tonnage capacities are 30°F evaporator ton loads, not total heat of rejection tons. Pressure drop through a Fre-Heater refrigeration circuit will be approximately 15 psi at the maximum tonnage application. Pressure drop at the mid-range of tonnage application will be approximately 5 to 7 psi. The best overall refrigeration/heat recovery system efficiency is usually obtained at or below the mid-range tonnage application.


Finding the right equipment that fits within your budget can be daunting. At Paul Mueller Company, we understand your needs. That’s why we offer Leasing options that give you more flexibility.

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